摘要
对各工况下的二维疲劳载荷,采用权系数的方法,合成并获得了多工况下的二维载荷联合概率密度函数。并由超越概率10-6对载荷进行外推,研究了确定多工况下二维疲劳设计谱中载荷最大值的概率推断——最速下降法的计算方法和步骤。实例的分析与比较,说明该方法是合理的和准确的,并由载荷最大值的分级和计算,编制了多工况下的8×8的二维疲劳设计谱。
Two dimensional fatigue loading under various working conditions is synthesized with weight coefficient method to obtain joint probability density function under multiple working conditions. To extend the fatigue loading,it is important to get the maximal loading by exceeding probability 10 -6 . The corresponding schemes are discussed to obtain the maximal loading for two dimensional fatigue design spectrum with probability extrapolation-steepest descent method,and 8×8 two dimensional fatigue design spectrum is established.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2006年第3期484-487,517,共4页
Chinese Journal of Applied Mechanics
关键词
疲劳设计谱
概率推断
最速下降法
载荷最大值
多工况
Fatigue design spectrum,Probability extrapolation,Steepest descent method,Maximal loading,Multiple working conditions.
